Load commanding - Metasys - LIT-12012116 - Server - Metasys UI - 7.0

Johnson Controls System Configuration Tool (JCT) Help

Brand
Metasys
Product name
Metasys UI
Document type
User Guide
Document number
LIT-12012116
Version
7.0
Revision date
2023-09-01
Language
English

Objects with a Load extension and intended for use with the DLLR feature permit the following operator or scheduled commands.

Table 1. Commands available to Load objects

Command

Parameters

Description

Shed

Type

Percent, Level, or Amount

Value

New shed value

Sheds the load immediately. The output is written at priority 13 (LR) if the Shed Strategy is set to Load Rolling Only. Otherwise, it is written at priority 11 (DL). When this command is issued, the output is commanded regardless of whether DLLR is in Shed or Monitor Only mode.

Select only the Level command and use the default value of 1. The Percent and Amount command options are intended for future use.

Release Load

None

Releases the load, which releases the command at the priority at which it was previously written by the shed command (11 or 13). The On Release attribute defined in the Load object determines whether the release occurs immediately when the command is issued, or waits for the Minimum Shed timer to expire.

Comfort Override

Release Immediately

Release After Timer Expires

Releases a shed load that is resulting in occupant discomfort. This command releases the shed and prevents a future shed until the Release Comfort Override command is issued. You can either select to release the load immediately when the command is issued, or only after the Minimum Shed Timer expires. If no parameter is selected, the default is to release the load immediately.

Release Comfort Override

None

Releases the Comfort Override command and allows the load to be shed.

Lock

None

Locks the load in its current shed or released state. The load remains in this state until an Unlock (or Disable) command is issued.

Unlock

None

Releases a Lock command. If the load was locked shed and its Maximum Shed Time expired, it now releases.

Disable

None

Disables the load, which causes it to release its output command immediately if it is shed, and clears any Lock or Comfort Override commands that have been issued. While disabled, the load is not eligible to be shed.

Enable

None

Enables the load, which permits it to be controlled by DLLR.

The following table illustrates command interactions that pertain to Load objects.

Table 2. Load command interactions

Load command(s) currently in effect

Load command not allowed

Explanation

Shed

Shed

Load cannot be shed because it is already shed.

Shed + Locked

Comfort Override

or

Release Load

Lock must be removed with Unlock command.

Comfort Override

Shed

Comfort Override must be released with Release Comfort Override command.

Released + Locked

Shed

Lock must be removed with Unlock command.

Released + Locked

and

Comfort Override

Shed

Comfort Override must be released with Release Comfort Override command.

Lock must be removed with Unlock command.